Splice for concrete-reinforce rods.



G. ALLEN.

SPLICE FOR CONCRETE REINFORGE RODS.

APPLICATION FILED APR. 13, 1911.

1,035,816. Patented Aug. 13,1912.

Witnesses Inventor 01 by a //V 1 Attorneys COLUMBIA PLANOGRAPH 60.,WAlHlNuTON. D. C.

GLENN ALLEN, OF SAN FRANCISCO, CALIFORNIA.

SPLICE FOR CONCRETE-REINFORCE RODS.

Specification of Letters Patent.

Patented An. 13, 1912.

Application filed April 13, 1911. Serial No. 620,915.

To all whom it may concern:

Be it known that I, GLENN ALLEN, a citizen of the United States, residing at San Francisco, in the county of San Francisco and State of California, have invented a new and useful Splice for Concrete-Reinforce Rods, of which the following is a specification.

This invention relates .to a splice sleeve for the rods or bars used in reinforced concrete construction.

The object of the invention is to provide a means for splicing the rods so that the splice will have all the tensile and compressive strength of the rods themselves, and to provide a splice which may be readlly put in place in the work without riveting, bolting, or welding the rods, or using other expensive processes.

With this object in view, the invention consists primarily of a sleeve slightly larger inside than the outside of the rods to be spliced, which sleeve is provided with elongated openings along its sides. When the rods are inserted in the sleeve their ends at the center of the sleeve will come in contact with each other or in contact with a metal diaphragm therein, as the case may be.

A more detailed description of my invention follows, reference being had to the accompanying drawing wherein- Figure 1 is a side elevation of onetype of this sleeve made of wire, with the abutting ends of two rods entered therein, Fig. 2 is a longitudinal central sectional View thereof, and Fig. 3 is a cross sectional view of the same on the line 33 of Fig. 2, the device being here shown as embedded in concrete. Fig. t is a side elevation of another type of this sleeve with the adjacent ends of two rods or bars entered therein against a soft metal diaphragm, the center of the sleeve being broken away to show the diaphragm. Fig. 5 is a cross section on the line 5-5 of Fig. 4, showing the splice embedded in concrete. Fig. 6 is a section on the line 3-3 of Fig. 2 showing the sleeve and bar as of different contour, the figure illustrating but one of many modifications of which the splice is susceptible.

In the drawings the letter S designates my improved sleeve, R designates the rods or bars which form the reinforcing element for the concrete C, and it is the construction of the sleeve alone which forms the subject matter of this patent.

In Figs. 1, 2, 3 and 6 the sleeve is made of wire, and comprises longitudinal rods 5, preferably bent outward slightly at their extremities as shown at 6 to permit the entrance of the rods It, and said rods 5 are surrounded by a coiled wire 7, or by a series of wire or metal rings or bands, said rings or bands being in contact with each other at the center of the splice where the coil is closely wound and being spaced apart at the ends of the splice where the coil is open. The bands are secured to the longitudinal rods 5 at all points of crossing and in any preferred or desired manner, the specific securing means forming no essential feature of the present invention. By preference the endmost coils or convolutions are open as seen best in Fig. 1, whereas the intermediate section of the coil has its convolutions 8 disposed in close contact with each other so as to produce a helix. An amplification of which this type of my invention is susceptible, as well as another type yet to be described, is the introduction of a soft metal diaphragm 9, as of lead or the like, within the helix 8 as best seen in Fig. 2, and this diaphragm may be sustained or retained therein in any manner desired.

In the type of my invention best illustrated in Figs. 4 and 5, the sleeve S is of tubular pattern, preferably cylindrical, and is in fact a piece of piping or tubing 10 whose bore is slightly larger than the external diameter of the rods R, the piping being imperforate as at 18 at about the center of its length and being of skeleton construction by having openings 17 through it. These openings in Fig. 4 are shown as rectangular so that most of the length of the piping 10 is slotted accordingly, whereas most of the length of the sleeve shown in Fig. 1 is slotted in diamonds, although it is to be understood that the openings may be of any shape and number desired so long as the sleeve at its ends is made in skeleton formation. Furthermore, as seen in Figs. 3 and 5, these openings may exist in greater or less numbers circumferentially of the sleeve. It might be said that the number and size and shape and disposition of the openings is a matter which will depend much upon the size of the sleeve and the forces and the direction of the forces that are to be applied to the reinforcing rods R and the sleeve S which connects them, and I reserve to myself considerable latitude in this respect.

The sectional construction illustrated in Fig. 6 typifies but one of many modifications of which this invention issusceptible. Fig. 6 may be said to be a section on the line 33 of F ig. 2 excepting that the latter illustrates a circular construction whereas Fig. 6 illustrates a rectangular form of sleeve. The latter might, in fact, be oval, square or oblong, or of almost any shape so that it will correspond with the cross sectional shape of the rods or bars B. In the case of sleeves for irregular shaped bars the metal bands may be used to inclose the longitudinal wires instead of the spiral coil as they adapt more readily in manufacture and I reserve the right to use either the spiral coil or the metal bands. In setting up the device, the rods R are properly disposed and supported, and Where the splice is to occur the meeting ends of the rods are inserted into the extremities of the sleeve and thrust toward each other. If the soft metal diaphragm 9 be used (and I prefer that it shall be), the extremities of the rods R will abut against the diaphragm and seat themselves in its opposite faces, and the fact that the rods R are not always cut off square is my rea son for making this diaphragm of soft metal, so that whatever the shape of the ex tremities of the rods, they will embed themselves into this diaphragm. After the parts have been rigidly assembled, the concrete in a plastic condition is poured over and around them, and it readily finds its way through the openings 17 of one type of the sleeve or between the wires or rods 5 and 7 of the other type, and forms clings or keys therein in a manner illustrated in Fig. 5 and well understood by the constructing engineer. After this plastic material has set, it will be found almost impossible to withdraw the rods or bars B from the sleeve or to move the device comprisingthe several rods and connecting sleeve longitudinally through the concrete.

The size and number of the longitudinal members in either pattern of sleeve will be regulated by the size of the bars or rods to be spliced and the length of the sleeve, and the number of cross members will be determined by the size of the bars and the shear of the concrete. It is to be understood that this sleeve may be made and used with or without the diaphragm, so that the expense of the soft metal cushion need not necessarily be incurred where the sleeve is used for tensile strength only; also that it may be made in various forms to fit different shapes of rein forcing rods or bars.

WVhat is claimed as new is 1. A splice for the adjacent ends of rods employed in reinforcing concrete constructions, the splice comprising a sleeve adapted to receive the ends of the rods to prevent the rods from having relative transverse movement; and a diaphragm in the sleeve, the diaphragm being fashioned from softer metal than the rods, whereby the end faces of the rods, when not in parallelism, may be embedded in the diaphragm, thereby to prevent the end faces of the rods from presenting bearing areas of less extent than the cross sectional areas of the rods, the sleeve constituting means for preventing a lateral spreading of the diaphragm.

2. A splice for the adjacent ends of rods used in reinforced concrete constructions, the splice comprising a plurality of longitudinal bars and a transverse wrapping secured about the bars, the wrapping consisting of an intermediate helical part, the convolutions of which are in contact, and end parts, the convolutions of which are spaced apart to permit the concrete to enter between the said convolutions and between the bars.

3. A splice for the adjacent ends of rods used in reinforced concrete constructions, the splice comprising a pluralty of longitudinal bars and a transverse wrapping secured about the bars, the wrapping consisting of an intermediate helical part, the convolutions of which are in contact, and end parts, the convolutions of which are spaced apart to permit the concrete to enter between said convolutions and between the bars; and a diaphragm located in the helical part, the diaphragm being fashioned from softer metal than the rods, whereby the end faces of the rods, when not in parallelism, may be embedded in the diaphragm, thereby to prevent the end faces of the rods from presenting bearing areas of less extent than the cross sectional areas of the rods, the sleeve constituting means for preventing lateral spreading of the diaphragm.

In testimony that I claim the foregoing as my own, I have hereto afixed my signature in the presence of two witnesses.

GLENN ALLEN.

Witnesses R. L. IJAMs, LILLA L. RICH.

copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. C. 

